didn't think of flour, was thinking charcoal would work, but i'm unsure about allergies (i have none so am clueless on that sort of things)

idea is to pale 'em up, then darken under the eyes (not totally black, not raccoons or pandas) and to shade the cheekbones to make 'em look gaunt.

Any dark colour will work, convert the finished film to b&w to mask colours and just have shades